Pinion or pulley coupling



Nov. 17,1925- 1,561,507

E. W. CLARK PINION 0R PULLEY COUPLING Filed April 25. 1925 EMClr/Y COPY- Patented Nov. 17, 1925.

UNITED TATES ED WILLIAM CLARK, 0F BYESVILLE, OHIO.

PINION 0R, PULLEY COUPLING.

Application and April 25, 1925. Serial No. 25,887.

To all whom it may concern.

Be it known that 1, ED WILLIAM CLARK, a citizen of the United States, residing at Byesville, in the county of Guernsey and State of Ohio, have invented certain new and useful Improvements in Pinion or Pulley Couplings, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to certain improve ments in shaft couplings and it is an object of the invention to provide means whereby a pulley, pinion or the like may be readily and conveniently fixed to a shaft or removed therefrom without requiring any special tools or the service of a skilled mechanic.

It is also an object of the invention to provide a coupling of this kind wherein a shaft is provided with -a tapered portion with which is adapted to cooperate a sectional sleeve adapted to fit on said tapered portion, said sleeve having a similarly tapered bore together with means coacting with the sleeve and shaft for moving said sleeve in either direction upon the shaft, said sleeve snugly fitting within the pulley, pinion or the like.

Another object of the invent-ion is to provide a coupling of this kind wherein a wedging sleeve is provided together with means for imparting requisite movement to said i sleeve and wherein a key is employed for coaction with the shaft and member to be fixed thereon, said key operating to hold the sleeve against independent movement about the shaft.

The invention consists in the details of construction and in the combination and ar rangement of the several parts of my improved shaft coupling whereby certain im portant advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous foruse, as will be hereinafter more fully set forth. i

The novel features of my inventionavill hereinafter be definitely claimed.

In order thatmy invention maybe the better understood, I will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a view partly in elevation and partly in longitudinal section illustrating a coupling constructed in accordance with an embodiment of my invention;

a Figure 2 is a sectional view taken substantially on the line 2--2 of Figure 1;

a Figure 3 ma View in elevation of the inner face of a section of the tapered sleeve continued by a reduced cylindrical exten-' sion 2 having its periphery threaded. The tapered portion 1 of the shaft is provided therealong with a key-way 3 for the key 4 for interlocking engagement with the pulley P. While I herein particularly illirtrate my improved coupling employed in connection with a pulley it is to be understood that the same can be used with equal facility in connection with apinion or other member desiredto be fixed upon the shaft S.

The sleeve A is longitudinally split to provide two sections 5, the bore of the sleeve A corresponding to the tapered portion 1 of the shaft S, the major diameter of said sleeve being the same from end to end.

Each of the sections 5 of the sleeve A in cross section is less than a semi-circle, such reduction being of an extent to compensate for the width of the applied key 4 so that when the sleeve A is in applied position the same will surround the portion 1 of the shaft S from one side of the key 4 to the other whereby the key 4 provides means effectually preventing the applied sleeve A from having rotary movement about the shaft S. a

The end of each sleeve section 5 at the small 6I1d 0f the bore is provided with an internally grooved collar Gadapted to in terlock with an inner end portion of a nut 7 threaded upon the extension 2 of the shaft S, said rear portion of thenut 7"being provided with an annular groove- 8 whereby suclr interlocking may be accomplished in a manner to permit rotation of the nut 7 independently of the sleeve A or each of the sections 5.

The outer end of the nut is castellated to provide the radially disposed slots 10 through which is adapted to be selectively v disposed a locking member 11 herein disclosed as a set screw, said member or-pinl 11 being insertible directly through the shaft extension 2.

In practice, the sections 5::of the sleeve A are first operatively engaged or interlocked with the nut 7 and then the pulley P or its equivalent is vmounted uponthe sleeve, the major radius of the sleeve being substantially thezsame as the radius of the bore of the pulley P, Theflkey 4 is then placed in its seat3 whereuponthe sleeve, A and the appliednpnlleyl? are slid on the shaft S or more fparticularlynthe tapered portion ,1 until thenut 7 comes in contact'with the shaft extension 2,.then by turning the .nut 7 .in 'the requisite direction the, sleeve, i'htogetherz with the: applied pulley P are placed in proper position upon the tapered portion 1 of the shaft, S. :By va few ,turns by. a v wrenclji or kindred implement on. the, nut 7 the-sleeve A is forced against. the. taper of the portion l and caused to expand Y within the pulley P-and thereby assuring an. effective. mounting on the shaft. After. the nut? has been properly adjusted .the pin 11, is applied to lock said-nut? against rotation. .Tloremove the L pulley P the foregoing operation is reversed.

VVith-a. couplingsas, herein. disclosed, the Work may be effectively accomplished with an ordinary wrench and without thenecessity of any special tool. A. coupling .of this kind will also prolong the .useof costly pinions and pulleys Which .are ofttimes. destroyed when removed from their respective mountings in the various manners now generally employed. :My improved coupling as herein disclosed also provides aneasy and quick way of placing the pulley or thelike on' the shaft liand, re taining the same'whenonce inaplaceand which does, not;.p,u1l the pulley or .the like to one side :as'.,.ofttimes occurs when the key itself. is driven home to. hold the; pulley in position. i

From the foregoing description it is thought to be obvious that aslia'ft coupling constructed in accordance with myyinven ..tion is particularly welladapted foruse by reason of the convenience and facility with which it,mayberJaSsembled' and operated, and it, will also be obvious that [my invention is susceptible. of somechange and modification withoutne arting f 1 1 5- Pr neip es...an pi t-.th reetem for -this reason Lido not-wishstoube,understotid. as

limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

Iclaimr- 1. In combination with a shaft having a tapered portion, a key-way extending along said tapered portion, a member to be mounted on said shaft having a bore, a sectional sleeve fitting within the bore of said member, the bore of the sleeve being tapered similar to the tapered portion of the shaft, said sleeve when assembled beingfless thana cylinder to provide a space .therealong, a key engaged within thejbore of themember and within the space'of othesleeve, said hey being also engageable within the key-way of theshaft, and a member threaded upon the shaft, said member and the adjacent end portions, ofthe sectionsof the sleeve. being provided with .coacting means ,to connect the sectionsof the sleeve to said last named member to permit-free rotation of said last named member but moving the sleeve en'd Wise with the movement of said last named member lengthwise ,of theshaft, said last namedvmeinber being operatively engaged with the end portion ofthe sleevehav-ing the smaller diameter of bore. o

2. In combination with a shaft having a tapered portion, a key-way extending along said tapered portion, a member to be mounted on said shaft having a'bore, a. sectional sleeve fitting within the bore of said member, the'bore of the sleeve being tapered similar to the tapered portion of the shaft, said sleeve when assembled being less than a cylinder to provide a space therealong, a key engaged wihin the bore ofthe vmember and within the space of the sleeve, said key being also engageable within the key-way of the shaft, member threaded uponthe shaft, said member and the adjacent end portions of the sections of thesleeve being provided with coacting means to connect the sections of the sleeve to said lastname'd member to permit free rotation of said last named member but moving the sleeve endwise with the move ment of said last named member lengthwiseof the shaft, and means coacting with the last-named member and the shaft for holding said last named member rotation. upon the shaft.

In testimony whereof-VI hereunto: aiiix my sig at re. ED .W, CLARK. 

